This header was originally in the C standard library as <fenv.h>.
This header is part of the floating-point environment library.
Types
fenv_t | The type representing the entire floating-point environment |
fexcept_t | The type representing all floating-point status flags collectively |
Functions
| (C++11) | clears the specified floating-point status flags (function) |
| (C++11) | determines which of the specified floating-point status flags are set (function) |
| (C++11) | raises the specified floating-point exceptions (function) |
| (C++11)(C++11) | copies the state of the specified floating-point status flags from or to the floating-point environment (function) |
| (C++11)(C++11) | gets or sets rounding direction (function) |
| (C++11) | saves or restores the current floating point environment (function) |
| (C++11) | saves the environment, clears all status flags and ignores all future errors (function) |
| (C++11) | restores the floating-point environment and raises the previously raise exceptions (function) |
Macros
| floating-point exceptions (macro constant) | |
| floating-point rounding direction (macro constant) | |
| (C++11) | default floating-point environment (macro constant) |
Synopsis
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | namespace std { // types typedef /*object type*/ fenv_t; typedef /*integer type*/ fexcept_t; // functions int feclearexcept(int except); int fegetexceptflag(fexcept_t *pflag, int except); int feraiseexcept(int except); int fesetexceptflag(const fexcept_t *pflag, int except); int fetestexcept(int except); int fegetround(void); int fesetround(int mode); int fegetenv(fenv_t *penv); int feholdexcept(fenv_t *penv); int fesetenv(const fenv_t *penv); int feupdateenv(const fenv_t *penv);} |
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